"The opposite belief, correlation proves causation, is a logical fallacy by which two events that occur together are claimed to have a cause-and-effect relationship. The fallacy is also known as cum hoc ergo propter hoc (Latin for "with this, therefore because of this") and false cause." [link to en.wikipedia.org]

Quoting: Anonymous Coward 1470044

So that premise can also be used to debunk the talking point that when you lower taxes on the rich, the Govt gains more revenue.